docs: def give_model_field(full_field, Model):
      """
      Given a field_name and Model:
  
      "test_user__unique_id", <AchievedGoal>
  
      Returns "test_user__unique_id", "id", <Model>, <ModelField>
      """
      field_data = get_fields(Model, '', [])
  
      for full_key, name, _Model, _ModelField in field_data:
          if full_key == full_field:
              return full_key, name, _Model, _ModelField
  
      raise Exception('Field key `{0}` not found on `{1}`.'.format(full_field, Model.__name__))